Pyrazinobutazone (Phenylbutazone piperazium) is an antipyrene derivative that possesses anti-inflammatory properties and has been associated with hypersensitivity reactions leading to agranulocytosis and liver injury.
References
[1] Agranulocytosis and liver damage associated with pyrazinobutazone with evidence for an immunological mechanism PMID:2600947
4-butyl-1,2-diphenylpyrazolidine-3,5-dione, compound with piperazine (1:1) Supplier
